The Prefix WhoIs Project Development Libraries

Currently, the Prefix WhoIs project distributes vanilla C and PHP libraries
for direct access to Prefix WhoIs. Our C library is also used by many developers to
access a plethora of other whois registries as it contains many functions to do so.

C Library for pWhoIs - Full support for pWhoIs in bulk or single queries. Additionally, this library supports many other network-related registrars along with functions to automatically recursively dig until you get the information you're looking for. The most recent copy of the whois library (whois.c & whois.h) may be found in the latest distribution of Layer Four Traceroute.